Looks like it was the cache. Centre alignment seems to be working with:
.avia-button-wrap.avia-button-center {
margin: 0 auto;
display: block;
}
Thanks all for your help!
Thanks Victoria, but still no joy.
Thanks Mike, but no joy.
OK disregard … as per https://kreatura.ticksy.com/ticket/1069171/ it must have been problem with importing slides from an older version. I had been trying to fix the previous slider, and the default slider which came with the original theme.
After recreating slider from scratch it is now working correctly.
Feel free to close thread.